I had to bite on this topic as well. Took a nose cap off and started measuring it out. I wonder if anyone has an actual factory drawing with measurements of such a piece?
Anyways, I wonder what anyone else's thoughts are on stamping 2 separate pieces and welding them together? The lower, larger side of the cap has long edges that sort of make using a piece of pipe a little more difficult. But if you were to bend a piece of 1/8" flat bar, it could possibly work.
I got excited and started making a die for the press to bend the steel. I'm honestly just winging it here with dimensions off the nose cap I took off one of my rifles, so it might not be perfect.
Need to make a rounded ram now and see how well I can bend a piece of flat bar. I suspect this die might spread out with use, so if this were to actually work I'd have to make the die out of a larger chunk of steel. This was 2" x 3" bar stock I had, but I'm hoping it should hold for a couple trials.
I'm hoping I can track down some pipe for the smaller side and then weld it to the bent piece, sling mount and bayonet lug could be welded on later of course.
Throw out the criticism folks, but don't expect results from me in any sort of super speedy fashion. I'm just messing around with this on the side when I have some free time.